filtering the reference spectrum

Home Forums Spectroscopy HELP WITH VISUAL SPEC filtering the reference spectrum

Robin Leadbeater

If you want to filter the reference spectrum first as i suggested in the tutorial in the other thread “ALHENA WITH A STARANALYSER”

then the spline filter function in Visual Spec can be found at “Operations”,  “Spline Filter”

it is also a good idea to roughly rescale the spectra first before calculating the instrument response so you dont have to deal with very large numbers. You can do this by selecting a region of the spectrum using the cursor (mouse left click and drag), then right click and select “normalize”. The result is the spectrum is averaged to 1 over the selected region